All in one size fit 0-2 Year Babies The adjustable snaps help the diaper perfectly ”fit babies from 8 to 33 pounds by snapping onto different rows of buttons. Grow with your baby from birth to potty training. The leg gussets are designed to keep the moisture inside the diaper to avoid leaks from spilling out the sides, The gentle elastic design won't hurt baby. The super soft inner bamboo fabric is very soft , and wicks moisture away from baby's bottom to the insert to help keep your baby comfortable. The cloth diapers should be changed every 2-3 hours to keep baby comfortable.